How severe is CVE-2020-7949?

CVE-2020-7949 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-7949 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-7949?

CVE-2020-7949 affects Valvesoftware Dota 2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-7949?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-7949 published?

CVE-2020-7949 was published on 2020-01-27 and last updated on 2026-06-17.

CVE-2020-7949

CVE-2020-7949 is a high-severity vulnerability in Valvesoftware Dota 2 with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Valvesoftware Dota 2
Published: 2020-01-27
Last modified: 2026-06-17

Description

schemasystem.dll in Valve Dota 2 before 7.23f allows remote attackers to achieve code execution or denial of service by creating a gaming server and inviting a victim to this server, because a crafted map is mishandled during a GetValue call.

Frequently asked questions

What is CVE-2020-7949?: schemasystem.dll in Valve Dota 2 before 7.23f allows remote attackers to achieve code execution or denial of service by creating a gaming server and inviting a victim to this server, because a crafted map is mishandled during a GetValue call.
How severe is CVE-2020-7949?: CVE-2020-7949 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-7949 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-7949?: CVE-2020-7949 affects Valvesoftware Dota 2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-7949?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-7949 published?: CVE-2020-7949 was published on 2020-01-27 and last updated on 2026-06-17.

References

https://github.com/bi7s/CVE/tree/master/CVE-2020-7949

Affected products (1)

cpe:2.3:a:valvesoftware:dota_2:*:*:*:*:*:*:*:*

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